have to go now
I have to get ready to leave. Well, I have to go now. It was lovely to see you, as always. I have to go now—I don't want to miss my train!
(I) have to go now.
an expression announcing the need to leave. Fred: Bye, have to go now. Mary: See you later. Take it easy. Sue: Would you help me with this box? John: Sorry. I have to go now.